Vance IngallsandClaude Fable 5
e2c88ef689
Live testing of the compile-time variable emission surfaced four gaps: - The producer render path never emitted the compile-time stylesheet (only the preview bundler did), so eval-time reads — GSAP .from immediateRender, top-level getComputedStyle — saw undefined vars in rendered output. The producer's inlineSubCompositions now calls the shared emitRootCompositionVariableStyles and passes the variable hooks. - --variables overrides weren't visible at eval time. They now thread from the orchestrator / distributed plan through compileStage into the emitted rules (window.__hfVariables still covers script reads). - Per-declarer rules anchored on data-composition-id, which two inlined instances of one sub-composition share — instance A's rule restyled instance B, and a rule directly on the declarer defeated the host's inherited data-variable-values. Rules now anchor on per-instance data-hf-var-scope markers and layer nearest-host values over declared defaults, mirroring the runtime loader. - Emission ignored authored CSS; a declared default now yields to a var already defined in an authored <style> block (define-if-absent, matching the runtime injection). Also: the figma importer emits background-color (longhand) for solid fills. GSAP backgroundColor tweens cannot read a var() through the background shorthand — its pending-substitution longhands serialize empty, so .from captured nothing and settled on transparent (pre-existing GSAP interaction, reproduced with no composition variables involved). Validated live: eval-time default + override, .from + override, two-instance host branding, authored :root precedence, SDS brand-loop pixel parity. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
hyperframes
CLI for creating, previewing, and rendering HTML video compositions.
Install
npm install -g hyperframes
Or use directly with npx:
npx hyperframes <command>
Requirements: Node.js >= 22, FFmpeg
Commands
init
Scaffold a new Hyperframes project from a template:
npx hyperframes init my-video
cd my-video
preview
Start the live preview studio in your browser:
npx hyperframes preview
# Studio running at http://localhost:3002
npx hyperframes preview --port 4567
render
Render a composition to MP4:
npx hyperframes render ./my-composition.html -o output.mp4
lint
Validate your Hyperframes HTML:
npx hyperframes lint ./my-composition
npx hyperframes lint ./my-composition --json # JSON output for CI/tooling
npx hyperframes lint ./my-composition --verbose # Include info-level findings
By default only errors and warnings are shown. Use --verbose to also display informational findings (e.g., external script dependency notices). Use --json for machine-readable output with errorCount, warningCount, infoCount, and a findings array.
compositions
List compositions found in the current project:
npx hyperframes compositions
benchmark
Run rendering benchmarks:
npx hyperframes benchmark ./my-composition.html
doctor
Check your environment for required dependencies (Chrome, FFmpeg, Node.js):
npx hyperframes doctor
browser
Manage the bundled Chrome/Chromium installation:
npx hyperframes browser
info
Print version and environment info:
npx hyperframes info
docs
Open the documentation in your browser:
npx hyperframes docs
upgrade
Check for updates and show upgrade instructions:
npx hyperframes upgrade
npx hyperframes upgrade --check --json # machine-readable for agents
Documentation
Full documentation: hyperframes.heygen.com/packages/cli
Related packages
@hyperframes/core— types, parsers, frame adapters@hyperframes/engine— rendering engine@hyperframes/producer— render pipeline@hyperframes/studio— composition editor UI